Across
1
Hottest planet in solar system
2
Push or pull on an object
3
Positive particle in nucleus
4
Form of thermal energy
5
Magnetic metallic element
7
Biological catalyst
9
Basic unit of life
11
Chemical element in table salt
Down
2
Preserved remains of ancient life
3
Tectonic landmass section
6
Curved glass that refracts light
8
Disturbance that transfers energy
10
Substance with pH below 7